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Growth condition controls on G-93 parameters of isoprene emission from tropical trees

Oku, Hirosuke ; Iwai, Shohei ; Uehara, Misaki ; Iqbal, Asif ; Mutanda, Ishmael ; Inafuku, Masashi

Journal of plant research, 2021-11, Vol.134 (6), p.1225-1242 [Periódico revisado por pares]

Singapore: Springer Singapore

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Título:
Growth condition controls on G-93 parameters of isoprene emission from tropical trees
Autor: Oku, Hirosuke ; Iwai, Shohei ; Uehara, Misaki ; Iqbal, Asif ; Mutanda, Ishmael ; Inafuku, Masashi
Assuntos: Air temperature ; Biomedical and Life Sciences ; Correlation analysis ; Emission analysis ; Emissions ; Emissions control ; Environmental control ; Erythritol ; Growth conditions ; Irradiance ; Isoprene ; Leaves ; Life Sciences ; Light intensity ; Luminous intensity ; Metabolites ; Parameters ; Photosynthesis ; Plant Biochemistry ; Plant Ecology ; Plant Physiology ; Plant Sciences ; Regular Paper – Ecology/Ecophysiology/Environmental Biology ; Saturation ; Temperature dependence ; Trees
É parte de: Journal of plant research, 2021-11, Vol.134 (6), p.1225-1242
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: Despite its major role in global isoprene emission, information on the environmental control of isoprene emission from tropical trees has remained scarce. Thus, in this study, we examined the relationship between parameters of G-93 isoprene emission formula ( C T1 , C T2 , and α), growth temperature and light intensity, photosynthesis ( ɸ, P max ), isoprene synthase (IspS) level, and 2-C-methyl- d -erythritol 4-phosphate (MEP) pathway metabolites using sunlit and shaded leaves of four tropical trees. The results showed that the temperature dependence of isoprene emission from shaded leaves did not differ significantly from sunlit leaves. In contrast, there was a lower saturation irradiance in shaded leaves than in sunlit leaves, the same as temperate plants. The photosynthesis rate of shaded leaves showed lower saturation irradiance, similar to the light dependence of isoprene emission. In most cases, the concentration of MEP pathway metabolites was of lower tendency in shaded leaves versus in sunlit leaves, whereas no significant difference was noted in IspS level between sunlit and shaded leaves. Correlation analysis between these parameters found that C T1 of the G-93 parameter was positively correlated with the concentration of DXP and DMADP, whereas C T2 correlated with the concentration of MEP and the average air temperature for the past 48 h. Similarly, α closely associated with the initial slope ( ɸ ) of photosynthesis rate, and the basal emission factor is also linked to the photon flux of past days. These results suggest that growth conditions may control the temperature dependence of isoprene emission from tropical trees via the changes in the profiles of MEP pathway metabolites, causing alteration in the parameters of the isoprene emission formula.
Editor: Singapore: Springer Singapore
Idioma: Inglês

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Growth condition controls on G-93 parameters of isoprene emission from tropical trees

Oku, Hirosuke ; Iwai, Shohei ; Uehara, Misaki ; Iqbal, Asif ; Mutanda, Ishmael ; Inafuku, Masashi

Singapore: Springer Singapore

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